The Kelvin scale is the temperature scale that does not have negative values. It begins at absolute zero, which is 0 Kelvin (K), and this point represents the theoretical lowest possible temperature where all molecular motion ceases.
The Kelvin scale is particularly important in scientific contexts because it is an absolute temperature scale. Unlike the Celsius or Fahrenheit scales, which can have negative values (for example, temperatures below 0 degrees Celsius), the Kelvin scale always remains non-negative. This is crucial for many scientific calculations, including those involving thermodynamics and other physical processes.